/* PorcentajeFácil — sistema visual unificado (estilo guías, mobile-first) */
:root {
  color-scheme: light;
  --color-bg: #f0f7f5;
  --color-bg-elev: #ffffff;
  --color-ink: #0f2a2e;
  --color-muted: #4a6368;
  --color-primary: #0d6e6e;
  --color-primary-dark: #0a5555;
  --color-primary-soft: #e8f6f4;
  --color-warm: #e07a3d;
  --color-warm-dark: #c45c26;
  --color-border: #c9dbdb;
  --color-ok: #1b7a4a;
  --color-err: #a12828;
  --color-ad-slot: #e4efed;
  --glow: rgba(13, 110, 110, 0.18);
  --header-bg: rgba(255, 255, 255, 0.88);
  --input-bg: #ffffff;
  --surface-soft: rgba(255, 255, 255, 0.7);
  --surface-soft-strong: rgba(255, 255, 255, 0.75);
  --body-orb-1: #c5ebe5;
  --body-orb-2: #ffe8d4;
  --chip-warm-bg: #ffecd9;
  --chip-warm-ink: #9a4a18;
  --group-card-bg: #fafcfb;
  --mistake-bg: #fff6f4;
  --mistake-border: #f0c4bc;
  --mistake-title: #8f2e28;
  --mistake-text: #5c3532;
  --radius: 14px;
  --radius-lg: 18px;
  --font: "Segoe UI", "Candara", "Gill Sans", "Trebuchet MS", sans-serif;
  --font-mono: "Cascadia Mono", "Consolas", ui-monospace, monospace;
  --max: 72rem;
  --pad: clamp(1rem, 3vw, 1.75rem);
}

/* Modo oscuro (opt-in; el claro sigue siendo el default) */
html[data-theme='dark'] {
  color-scheme: dark;
  --color-bg: #0c1a1c;
  --color-bg-elev: #142628;
  --color-ink: #e6f2f1;
  --color-muted: #9bb5b8;
  --color-primary: #2eb3b0;
  --color-primary-dark: #5fd0cd;
  --color-primary-soft: #1a3538;
  --color-warm: #e08a52;
  --color-warm-dark: #f0a574;
  --color-border: #2a4548;
  --color-ok: #3dba74;
  --color-err: #e07070;
  --color-ad-slot: #1a2e30;
  --glow: rgba(46, 179, 176, 0.22);
  --header-bg: rgba(12, 26, 28, 0.92);
  --input-bg: #0f1f21;
  --surface-soft: rgba(20, 38, 40, 0.85);
  --surface-soft-strong: rgba(20, 38, 40, 0.92);
  --body-orb-1: rgba(20, 90, 88, 0.35);
  --body-orb-2: rgba(120, 70, 40, 0.18);
  --chip-warm-bg: #3a2a1c;
  --chip-warm-ink: #f0b888;
  --group-card-bg: #101f21;
  --mistake-bg: #2a1818;
  --mistake-border: #5a3030;
  --mistake-title: #f0a0a0;
  --mistake-text: #d0b0b0;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--color-ink);
  background:
    radial-gradient(ellipse 90% 50% at 10% -5%, var(--body-orb-1) 0%, transparent 55%),
    radial-gradient(ellipse 70% 40% at 100% 0%, var(--body-orb-2) 0%, transparent 50%),
    var(--color-bg);
  line-height: 1.55;
  min-height: 100vh;
  transition: background-color 0.2s ease, color 0.2s ease;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary-dark);
}

a:hover {
  color: var(--color-primary);
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: var(--pad);
  top: 0.5rem;
}

.wrap {
  width: min(100% - 2 * var(--pad), var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  background: var(--header-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header.has-mega {
  box-shadow: 0 12px 28px rgba(15, 42, 46, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  flex-wrap: wrap;
}

.header-tools {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-left: auto;
}

.theme-toggle {
  appearance: none;
  display: inline-grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elev);
  color: var(--color-ink);
  cursor: pointer;
  font-size: 1.15rem;
  line-height: 1;
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.theme-icon-sun {
  display: none;
}

html[data-theme='dark'] .theme-icon-moon {
  display: none;
}

html[data-theme='dark'] .theme-icon-sun {
  display: inline;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: var(--color-ink);
  font-weight: 800;
  font-size: 1.12rem;
  letter-spacing: -0.03em;
}

.brand-mark {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 10px;
  background: linear-gradient(145deg, var(--color-primary), #149494);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 1rem;
  font-weight: 800;
  box-shadow: 0 4px 12px var(--glow);
}

.nav-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elev);
  border-radius: 10px;
  padding: 0.5rem 0.8rem;
  cursor: pointer;
  font-weight: 700;
}

.site-nav {
  display: none;
}

.site-nav.is-open {
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: var(--color-bg-elev);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem var(--pad) 1.15rem;
  max-height: min(78vh, 40rem);
  overflow: auto;
  box-shadow: 0 16px 36px rgba(15, 42, 46, 0.12);
}

.nav-primary {
  list-style: none;
  margin: 0 0 0.85rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
}

.nav-primary a,
.nav-more-btn {
  text-decoration: none;
  display: block;
  padding: 0.65rem 0.7rem;
  color: var(--color-ink);
  font-weight: 750;
  font: inherit;
  border-radius: 10px;
  background: var(--color-primary-soft);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: left;
  width: 100%;
}

.nav-primary a:hover,
.nav-more-btn:hover {
  border-color: var(--color-border);
}

.nav-more {
  display: none; /* Solo escritorio: en móvil el catálogo completo ya va debajo */
}

.nav-more-btn {
  background: var(--color-bg-elev);
  border-color: var(--color-border);
}

/* En móvil el mega siempre visible dentro del menú abierto */
.site-nav.is-open .mega-panel[hidden],
.site-nav.is-open .mega-panel {
  display: block !important;
}

.mega-panel {
  display: none;
  border-top: 1px solid var(--color-border);
  padding-top: 0.85rem;
}

.mega-lead {
  margin: 0 0 0.75rem;
  font-size: 0.88rem;
  color: var(--color-muted);
  font-weight: 650;
}

.mega-grid {
  display: grid;
  gap: 1rem;
}

.mega-col h2 {
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.mega-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.2rem;
}

.mega-col a {
  text-decoration: none;
  display: block;
  padding: 0.35rem 0;
  color: var(--color-ink);
  font-weight: 650;
  font-size: 0.92rem;
}

.mega-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--color-border);
}

@media (min-width: 860px) {
  .header-inner {
    position: relative;
    flex-wrap: nowrap;
  }

  .header-tools {
    order: 3;
    margin-left: 0.35rem;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: block;
    position: static;
    border: 0;
    padding: 0;
    background: transparent;
    max-height: none;
    overflow: visible;
    box-shadow: none;
    order: 2;
    margin-left: auto;
  }

  .nav-primary {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 0.15rem 0.75rem;
    margin: 0;
    align-items: center;
  }

  .nav-primary a {
    background: transparent;
    padding: 0.35rem 0.15rem;
    font-size: 0.9rem;
  }

  .nav-more {
    display: list-item;
  }

  .nav-more-btn {
    width: auto;
    background: transparent;
    border: 0;
    padding: 0.35rem 0.25rem;
    font-size: 0.9rem;
    font-weight: 750;
    color: var(--color-ink);
  }

  .nav-more-btn[aria-expanded='true'] {
    color: var(--color-primary);
  }

  /* Escritorio: mega solo con «Más» */
  .site-nav.is-open .mega-panel,
  .mega-panel[hidden],
  .mega-panel {
    display: none !important;
  }

  .mega-panel.is-open:not([hidden]) {
    display: block !important;
    position: absolute;
    left: 50%;
    right: auto;
    top: calc(100% + 1px);
    width: 100vw;
    max-width: none;
    transform: translateX(-50%);
    background: var(--color-bg-elev);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 18px 40px rgba(15, 42, 46, 0.14);
    padding: 1.15rem max(var(--pad), calc((100vw - var(--max)) / 2)) 1.35rem;
    z-index: 120;
    max-height: min(70vh, 32rem);
    overflow: auto;
  }

  .nav-more-btn {
    color: var(--color-primary-dark);
  }

  .mega-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

@media (min-width: 560px) and (max-width: 859px) {
  .mega-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* Kickers & heroes (compartido con guías) */
.guide-kicker,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0 0 0.5rem;
}

.guide-kicker::before,
.eyebrow::before {
  content: "";
  width: 1.4rem;
  height: 3px;
  background: var(--color-warm);
  border-radius: 2px;
}

.page-hero,
.guide-hero,
.hero {
  position: relative;
  padding: 1.15rem 0 1.5rem;
  overflow: hidden;
}

.page-hero::before,
.guide-hero::before,
.hero::before {
  content: "";
  position: absolute;
  inset: -25% -12% auto;
  height: 75%;
  background:
    radial-gradient(ellipse 80% 60% at 15% 40%, #b8e8e2 0%, transparent 55%),
    radial-gradient(ellipse 70% 50% at 92% 18%, #ffe0c8 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
  animation: hero-glow 8s ease-in-out infinite alternate;
}

@keyframes hero-glow {
  from {
    opacity: 0.65;
    transform: scale(1);
  }
  to {
    opacity: 1;
    transform: scale(1.04);
  }
}

.page-hero > .wrap,
.guide-hero > .wrap,
.hero > .wrap {
  position: relative;
  z-index: 1;
}

h1 {
  font-size: clamp(1.75rem, 6.5vw, 2.65rem);
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin: 0 0 0.7rem;
}

.page-hero h1,
.guide-hero h1 {
  max-width: 18ch;
}

.lead {
  margin: 0 0 1.1rem;
  color: var(--color-muted);
  font-size: 1.05rem;
  max-width: 36rem;
}

.hero-grid {
  display: grid;
  gap: 1.15rem;
}

@media (min-width: 920px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }
}

.guide-stats,
.site-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin: 0 0 1.15rem;
  max-width: 28rem;
}

.guide-stat,
.site-stat {
  padding: 0.65rem 0.45rem;
  text-align: center;
  background: var(--surface-soft-strong);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  backdrop-filter: blur(6px);
}

.guide-stat strong,
.site-stat strong {
  display: block;
  font-size: clamp(1.1rem, 4vw, 1.4rem);
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}

.guide-stat span,
.site-stat span {
  font-size: 0.72rem;
  color: var(--color-muted);
  font-weight: 650;
}

.guide-cta-row,
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

/* Tool panel */
.tool-panel {
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 28px var(--glow);
  padding: 1.05rem 1rem 1.15rem;
  animation: rise-in 0.45s ease both;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.tool-panel h2 {
  margin: 0 0 0.85rem;
  font-size: 1.12rem;
  letter-spacing: -0.02em;
}

.tool-panel + .tool-panel {
  margin-top: 0.85rem;
}

.field {
  display: grid;
  gap: 0.3rem;
  margin-bottom: 0.75rem;
}

.field label {
  font-weight: 700;
  font-size: 0.92rem;
}

.field input,
.field select {
  font: inherit;
  padding: 0.75rem 0.8rem;
  border-radius: 11px;
  border: 1px solid var(--color-border);
  background: var(--input-bg);
  color: var(--color-ink);
  min-height: 2.85rem;
}

.field input:focus,
.field select:focus,
.btn:focus-visible,
.nav-toggle:focus-visible,
a:focus-visible {
  outline: 3px solid #7ec8c8;
  outline-offset: 2px;
}

.field input[aria-invalid='true'] {
  border-color: var(--color-err);
}

.field-hint {
  font-size: 0.8rem;
  color: var(--color-muted);
}

.field-row {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 560px) {
  .field-row {
    grid-template-columns: 1fr 1fr;
  }
}

.radio-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.radio-row label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 650;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 2.9rem;
  padding: 0.65rem 1.15rem;
  border-radius: 12px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.btn-warm {
  background: var(--color-warm);
  color: #fff;
}

.btn-warm:hover {
  background: var(--color-warm-dark);
  color: #fff;
}

.btn-ghost {
  background: var(--surface-soft);
  border-color: var(--color-border);
  color: var(--color-ink);
}

.results {
  margin-top: 0.9rem;
  padding: 0.95rem;
  border-radius: 14px;
  background: linear-gradient(165deg, #0d6e6e, #0a5555);
  color: #fff;
  border: 0;
  min-height: 4.5rem;
  box-shadow: 0 12px 28px var(--glow);
}

.results[hidden] {
  display: none !important;
}

.result-list {
  margin: 0;
  display: grid;
  gap: 0.45rem;
}

.result-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
}

.result-row dt {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9rem;
}

.result-row dd {
  margin: 0;
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
  color: #fff;
}

.result-formula {
  margin: 0.7rem 0 0;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.78);
  font-family: var(--font-mono);
}

.result-error {
  margin: 0;
  color: #ffd4d0;
  font-weight: 700;
}

.result-actions {
  margin-top: 0.7rem;
}

.result-actions .btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}

/* Sections */
.section {
  padding: 1.6rem 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.45);
  border-block: 1px solid var(--color-border);
}

.section-tight {
  padding-top: 0.4rem;
}

.muted {
  color: var(--color-muted);
}

.section-title {
  margin: 0 0 0.35rem;
  font-size: clamp(1.25rem, 3.5vw, 1.55rem);
  letter-spacing: -0.03em;
}

/* Tiles (estilo guías) */
.guide-rail,
.tool-grid {
  display: grid;
  gap: 0.8rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.tool-grid {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 980px) {
  .tool-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.guide-tile,
.tool-card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.85rem;
  align-items: center;
  padding: 1rem 1rem 1rem 0.9rem;
  text-decoration: none;
  color: inherit;
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.guide-tile::before,
.tool-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  background: var(--tile-accent, var(--color-primary));
}

.guide-tile:hover,
.guide-tile:focus-visible,
.tool-card:hover,
.tool-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--tile-accent, var(--color-primary));
  box-shadow: 0 10px 28px var(--glow);
  color: inherit;
}

.guide-tile-icon,
.tool-icon {
  width: 3.1rem;
  height: 3.1rem;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(
    145deg,
    var(--tile-accent, #0d6e6e),
    color-mix(in srgb, var(--tile-accent, #0d6e6e) 70%, #000)
  );
  flex-shrink: 0;
}

.guide-tile h2,
.guide-tile h3,
.tool-card h3 {
  margin: 0 0 0.2rem;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
}

.guide-tile p,
.tool-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--color-muted);
  line-height: 1.35;
}

.guide-tile-meta,
.tile-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.4rem;
}

.chip {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 750;
  padding: 0.18rem 0.45rem;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.chip-warm {
  background: var(--chip-warm-bg);
  color: var(--chip-warm-ink);
}

.guide-tile-arrow,
.tile-arrow {
  font-size: 1.35rem;
  color: var(--tile-accent, var(--color-primary));
  font-weight: 700;
  transition: transform 0.2s ease;
}

.guide-tile:hover .guide-tile-arrow,
.tool-card:hover .tile-arrow {
  transform: translateX(4px);
}

@media (max-width: 520px) {
  .guide-tile,
  .tool-card {
    grid-template-columns: auto 1fr;
  }
  .guide-tile-arrow,
  .tile-arrow {
    display: none;
  }
}

/* Formula / demos (compartido) */
.formula-stage {
  margin: 1rem 0 1.35rem;
  padding: 1.15rem 1rem 1.25rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, #0d6e6e 0%, #0a5555 55%, #164a4a 100%);
  color: #fff;
  box-shadow: 0 16px 40px var(--glow);
}

.formula-stage .label {
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.8;
  margin: 0 0 0.5rem;
}

.formula-stage .big {
  font-size: clamp(1.2rem, 5vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.25;
  font-family: var(--font-mono);
  margin: 0 0 0.55rem;
  word-break: break-word;
}

.formula-stage .hint {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.88;
}

.demo-board {
  display: grid;
  gap: 0.55rem;
  margin: 1rem 0 1.25rem;
  list-style: none;
  padding: 0;
}

.demo-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.85rem 1rem;
  background: var(--color-bg-elev);
  border-radius: 14px;
  border: 1px solid var(--color-border);
}

.demo-row .q {
  font-weight: 650;
  font-size: 0.95rem;
}

.demo-row .a {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.step-stack {
  display: grid;
  gap: 0.7rem;
  margin: 1rem 0 1.35rem;
  counter-reset: step;
}

.step-card {
  position: relative;
  padding: 1rem 1rem 1rem 3.35rem;
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  counter-increment: step;
}

.step-card::before {
  content: counter(step);
  position: absolute;
  left: 0.85rem;
  top: 1rem;
  width: 1.85rem;
  height: 1.85rem;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 800;
  font-size: 0.9rem;
  display: grid;
  place-items: center;
}

.step-card h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
}

.step-card p {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.92rem;
}

.mistake-box {
  margin: 1.15rem 0;
  padding: 1rem;
  border-radius: 14px;
  background: var(--mistake-bg);
  border: 1px solid var(--mistake-border);
}

.mistake-box h2 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--mistake-title);
}

.mistake-box ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--mistake-text);
}

.visual-tip {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  align-items: start;
  margin: 1rem 0;
  padding: 0.9rem;
  background: var(--color-bg-elev);
  border-radius: 14px;
  border: 1px dashed var(--color-border);
}

.visual-tip .glyph {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 800;
}

.visual-tip p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-muted);
}

.guide-next {
  margin: 1.5rem 0 0;
  padding: 1.1rem;
  border-radius: 16px;
  background: linear-gradient(135deg, #e8f6f4, #fff8f0);
  border: 1px solid var(--color-border);
}

.guide-next h2 {
  margin: 0 0 0.7rem;
  font-size: 1.08rem;
}

.guide-next-links {
  display: grid;
  gap: 0.5rem;
}

.guide-next-links a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-decoration: none;
  font-weight: 700;
  padding: 0.75rem 0.9rem;
  background: var(--color-bg-elev);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  color: var(--color-ink);
}

.guide-next-links a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.faq details {
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 0.8rem 1rem;
  margin-bottom: 0.55rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 750;
}

.prose {
  max-width: 42rem;
}

.prose h2 {
  margin-top: 1.35rem;
  letter-spacing: -0.02em;
}

.breadcrumbs {
  font-size: 0.86rem;
  color: var(--color-muted);
  margin: 0.75rem 0 0;
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
}

.breadcrumbs li:not(:last-child)::after {
  content: '/';
  margin-left: 0.35rem;
  opacity: 0.6;
}

.search-box input {
  width: 100%;
  font: inherit;
  padding: 0.75rem 0.85rem;
  border-radius: 11px;
  border: 1px solid var(--color-border);
  background: var(--input-bg);
  color: var(--color-ink);
}

.search-results {
  list-style: none;
  margin: 0.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.search-results a {
  text-decoration: none;
  font-weight: 700;
}

.ad-slot {
  min-height: 90px;
  border: 1px dashed var(--color-border);
  background: var(--color-ad-slot);
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: var(--color-muted);
  font-size: 0.8rem;
  margin: 1rem 0;
}

.history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
  font-size: 0.9rem;
}

.history-type {
  display: inline-block;
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  border-radius: 999px;
  padding: 0.1rem 0.45rem;
  font-size: 0.75rem;
  font-weight: 700;
  margin-right: 0.35rem;
}

.side-stack {
  display: grid;
  gap: 0.85rem;
}

/* Footer */
.site-footer {
  margin-top: 2rem;
  padding: 1.85rem 0 2.35rem;
  border-top: 1px solid #1a454a;
  background: linear-gradient(180deg, #0f2f33, #0a2226);
  color: #d7e8e8;
}

.site-footer a {
  color: #b7e0de;
}

.footer-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 700px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .footer-grid-wide {
    grid-template-columns: 1.6fr repeat(4, minmax(0, 1fr));
  }
}

.footer-cta {
  margin: 0.65rem 0 0;
  font-size: 0.9rem;
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 0.55rem;
  max-width: 46rem;
}

.faq-item {
  background: var(--color-bg-elev);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 0.15rem 0.85rem 0.15rem;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 800;
  padding: 0.85rem 0;
  list-style: none;
  letter-spacing: -0.01em;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  float: right;
  color: var(--color-primary);
  font-weight: 800;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  margin: 0 0 0.9rem;
  color: var(--color-muted);
  line-height: 1.55;
}

.site-footer h2 {
  font-size: 0.95rem;
  margin: 0 0 0.5rem;
  color: #fff;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.3rem;
}

.footer-note {
  margin-top: 1.25rem;
  font-size: 0.85rem;
  opacity: 0.85;
}

.example-list {
  margin: 0.5rem 0 0;
}

/* Modo iframe (?embed=1) */
html.embed-mode .site-header,
html.embed-mode .site-footer,
html.embed-mode .breadcrumbs,
html.embed-mode .ad-slot,
html.embed-mode .cta-row {
  display: none !important;
}

html.embed-mode .page-hero::before,
html.embed-mode .hero::before {
  display: none;
}

html.embed-mode body {
  background: var(--color-bg);
}

/* Reparto de cuenta (cena / familias) */
.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0 0 0.85rem;
}

.chip-btn {
  appearance: none;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elev);
  color: var(--color-ink);
  font: inherit;
  font-weight: 750;
  font-size: 0.82rem;
  padding: 0.55rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
  min-height: 2.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.chip-btn input {
  margin: 0;
}

.chip-btn.is-active,
.chip-btn:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary-dark, #0a5555);
}

.stepper {
  display: grid;
  grid-template-columns: 2.6rem 1fr 2.6rem;
  align-items: center;
  gap: 0.35rem;
}

.stepper input {
  text-align: center;
  font-weight: 800;
  font-size: 1.05rem;
  padding: 0.65rem 0.35rem;
  min-height: 2.85rem;
}

.stepper button {
  appearance: none;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elev);
  border-radius: 11px;
  font-size: 1.25rem;
  font-weight: 800;
  min-height: 2.85rem;
  cursor: pointer;
  color: var(--color-primary);
}

.stepper button:active {
  transform: scale(0.96);
}

.group-card {
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 0.75rem;
  background: var(--group-card-bg);
  margin-bottom: 0.65rem;
}

.group-card-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.4rem;
  margin-bottom: 0.55rem;
}

.group-card-head input[type='text'] {
  font: inherit;
  font-weight: 750;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--input-bg);
  color: var(--color-ink);
  min-height: 2.5rem;
}

.btn-icon {
  appearance: none;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-elev);
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--color-muted);
}

.field-legend {
  font-weight: 800;
  font-size: 0.92rem;
  margin: 0.35rem 0 0.5rem;
}

.weight-block {
  margin: 0.25rem 0 0.85rem;
  padding-top: 0.25rem;
  border-top: 1px dashed var(--color-border);
}